WHY THEY EXIST AND WHAT YOU CAN DO TO KEEP YOUR LAWN HEALTHY
Depending on where you live, you may or may not be familiar with fertilizer application restriction periods, commonly referred to as “blackout periods.” While some see blackout periods as an inconvenience, the majority has come to accept them as an important step in protecting our waterways and the environment. In this article, we’ll learn the science behind why blackout periods exist. We’ll also help you comply with local and state ordinances by giving you tips that will help you keep your lawn a vibrant green during these blackout periods.
WHAT ARE BLACKOUT PERIODS?
Blackout periods are a time frame when fertilizers containing nitrogen and/or phosphorus are not permitted to be applied to turf, ornamentals, or a variety of other plants. Most blackout periods run from early June though late September and are located in tropical/subtropical climates. In the United States, the majority of blackout period laws are enforced on a county to county basis within the state of Florida. Florida blackout periods tend to correlate with the rainy season in this region. In the northeast/mid-Atlantic region, Maryland and New Jersey have their own set of blackout restrictions which run from Nov 15, through March 1. These blackout periods also correlate with this region’s rainy season.
Fig. 1. Florida Blackout Map
Fig. 2. Golf Course Flooding
THE SCIENCE BEHIND BLACKOUT PERIODS
Water is the world’s most precious resource; without it, animal life suffers, and human civilization would not be possible. Blackout periods serve to protect our waterways for the greater good of our environment. In order to understand why blackout periods exist, let’s briefly brush up on our plant biology and ecology.
All plants require primary nutrients for growth and reproduction. In most cases, nitrogen and phosphorous have the greatest impact on plant growth. If either of these nutrients are lacking in the soil, plants tend to suffer. In most soils, phosphorus is already abundant, however adequate nitrogen is lacking; that’s why most fertilizers contain high concentrations of nitrogen. Using turfgrass as an example, when turf is fed an ideal amount of nitrogen under ideal conditions (perfect temperature, adequate water, adequate sunlight), turf maintains a deep green vibrancy and healthy growth rate.
The problem begins when freshly applied fertilizer encounters a multi-day rain event. Much of this water eventually ends up in lakes or bays, and with this water comes excessive amounts of wasted fertilizer that never had a chance of being taken up by lawns and target plants. Eventually, large quantities of dissolved nitrogen and phosphorus collect in shallow lakes and bays, setting the scene for an environmental disaster caused by freshwater algae.
Fig. 3. Freshwater Algal
Fresh water algae are a broad range of photosynthetic organisms. Some are single cellular; some are multi-cellular. Some are more like bacteria, and some are more like plants. Algae are typically divided into two large groups: blue-green algae and brown algae. No matter their classification, most algae tend to be planktonic (free-floating) and require the same primary nutrients as plants (N-P-K.)
When algae, shallow water, sunlight, heat, and excessive fertilizer (mainly nitrogen and phosphorus) are all present, algae grow and multiply at an exponential rate, resulting in an algal
bloom. This process is called eutrophication, and the effects are devastating. As the water fills with algae, animal life (such as fish, frogs, mussels, etc.) suffocate. Bottom dwelling fresh water plants die off because the sunlight becomes blocked. This results in a large body of water being depleted of oxygen. Once the algae run out of nutrients, they die off in mass quantities and sink to the bottom. This results in a population spike of bacteria, and the bacteria begin to feed on the algal remains. These same bacteria also consume large quantities of oxygen, further depleting fresh-water bodies of already scare oxygen. Once the bacteria die off, dead zones may form in lakes and bays. Dead zones are regions of water with very little oxygen that can support almost no aquatic life. Dead zones
can take years, if not decades to recover from impacts of excessive fertilizer run off.
Fig. 4. Eutrophication & Dead Zones
Fig. 5. Algal Bloom
THE DEADLY EFFECTS OF CYANOTOXINS ON HUMAN AND ANIMAL LIFE
One of the most serious ramifications of fertilizer runoff is cyanobacteria (blue-green algae) blooms. Cyanobacteria produce highly potent toxins called cyanotoxins. This large range of compounds has been shown to harm the liver, kidneys, reproductive system, and nervous system. Some cyanotoxins are believed to be carcinogenic (numerous studies are currently under way to validate these claims). When the concentration of cyanotoxins becomes excessive in drinking water, filtering these toxins out becomes challenging. In extreme situations, municipalities will warn residents not to drink from city water supplies due to the treatment plant’s inability to filter cyanotoxins down to safe levels.
Fig. 6. Algal Bloom
ALTHOUGH INCONVENIENT, SMART FERTILIZER MANAGEMENT PRACTICES BENEFIT US ALL
Whether or not an individual chooses to use fertilizer, the choices societies make regarding fertilizer use directly affect human health and the health of the environment. For all these reasons, many states have adopted regulations regarding the amount of nitrogen and phosphorus that can be applied to turf, AND when these nutrients may be applied. (For example, in Maryland, no more than 0.9 lbs N per 1000 sq ft. may be applied at any given application, and no more than 0.7 lbs N per 1000 sq ft. may be readily available nitrogen). These rules exist year-round, in addition to blackout periods. Naturally, many disagree regarding the specifics of some of these rules, but in general, as our knowledge of the science behind fertilizer run-off and eutrophication improves, regulations are re-examined and revised accordingly.
WHAT CAN I DO TO KEEP MY LAWN HEALTHY DURING BLACKOUT PERIODS?
Because blackout periods typically last 3-4 months, it is imperative to make your last fertilizer application prior to the blackout period as effective as possible.
Suggestion: Before applying any fertilizers or soil amendments, check with your local, county, and state governments for ordinances regarding when and how much fertilizer you can put down in a calendar year.
There are many techniques you can use to keep your lawn green until the blackout period ends. Give these tips a try:
1. Use more slow/controlled release nitrogen.
- Polymer Coated Sulfur Coated urea (PCSCU, XCU, SCU, etc.) is designed to release nitrogen slowly and continuously throughout a designated time frame. Some slow/controlled release nitrogen products last 30 days; others- 90 days or more. Consider using a fertilizer blend where 75%+ of the total nitrogen in the bag is slow release. This may get you through most or all the blackout period.
2. Deepen your lawn’s green color by supplementing it with an iron product.
- Iron sulfate– this is the most common source of iron; it provides a quick greenup and is relatively inexpensive.Be careful around concrete driveways and sidewalks as this product can stain once it dissolves in water.
- Iron sucrate– although a little more expensive than iron sulfate, this product also provides a quick greenup that can last several months. Iron sucrate is safer around concrete as it does not stain upon accidental contact.
3. Add a soil amendment that conditions the soil to retain moisture and nutrients (which reduces leaching and volatilization). AMP-XC™ Liquid Concentrate was specially formulated for blackout periods and is designed to take advantage of reduced fertilizer inputs to keep your lawn healthy and green all year long. AMP-XC (L) contains the following:
- Humic Substances – humic and fulvic acid condition the soil to 1.) retain soil moisture 2.) chelate micronutrients in the soil and 3.) stimulate root growth so that root systems can find more nutrients in the root zone and access more water
- Microbial Metabolites – these amino acids, organic acids, protein hydrolysates and other organic compounds provide turf all the building blocks it needs to accelerate its growth and metabolism
- Chelated Iron – 100% soluble EDTA iron gets into plant roots more efficiently than any other form of iron; great for maximum greening during blackout periods
For professional fertilizers, humic and AMP-XC™ enriched products available, please visit TurfCare’s online Product Catalog.
For green industry professionals or others interested in ordering Turfcare products, please contact our Customer Service
to find a distributor near you.
Resources:
http://mda.maryland.gov/SiteAssets/Pages/fertilizer/TT119.pdf
https://www.epa.gov/nutrient-policy-data/cyanobacteriacyanotoxins
https://oceanservice.noaa.gov/facts/eutrophication.html
https://www.nj.gov/dep/healthylawnshealthywater/
https://www.cga.ct.gov/2012/rpt/2012-R-0076.htm
http://mda.maryland.gov/Pages/fertilizer.aspx
https://www.volusia.org/services/community-services/extension/horticulture/fertilizer-faqs.stml
Pictures:
Blackout Periods 01 - Eutrophication & Dead Zones http://slideplayer.com/slide/1660466/7/images/25/Eutrophication+and+Dead+Zones.jpg
Blackout Periods 02 - Algal Bloom http://www.miseagrant.umich.edu/wp-content/blogs.dir/1/files/hab/hab-dsc_5400.jpg
Blackout Periods 03 - Florida Blackout Map gcmonline.com/news/adopting-seasonal-fertilizer-blackout-periods (note, this link is dead)
Blackout Periods 04 – Eutrophication in Lake Erie http://ecofore.org/wp-content/uploads/2014/01/lake-erie-is-dead.jpg
Blackout Periods 05 – Algal Bloom 2 http://blogs.edf.org/growingreturns/files/2015/10/Ohio-Wetlands-Association.jpg
Blackout Periods 06 – Algal Bloom 3 https://toxics.usgs.gov/photo_gallery/photos/emer_cont/cyanobac/AlgaeBloomSign_MarionReservoirKS_003_l.jpg
Blackout Periods 07 - Impact of Cyanotoxins http://www.cleanwateraction.org/sites/default/files/The%20Health%20Impacts%20of%20Cyanotoxins.jpg
Blackout Periods 08 - Golf Course Flooding http://www.calgaryherald.com/news/alberta/cms/binary/10042271.jpg?size=640x420
Blackout Periods 09 - Freshwater Algae http://4.bp.blogspot.com/-lGEkrjygcpM/VRM-QOVz3gI/AAAAAAAADZ8/VDu3oGr9kbk/s1600/freshwater-algae.jpg
Turf Care Supply - TurfReport Blog
Turf Care Supply, LLC, a portfolio company of Platte River Equity, has officially acquired Beaty Fertilizer, the industry respected Tennessee-based manufacturer and blender of custom granular and liquid fertilizers, as well as combination products. This strategic move expands Turf Care’s manufacturing footprint, adds new product capabilities, and enhances overall production capacity. “The partnership with Beaty Fertilizer marks a major milestone in our journey and an important step forward in our mission to grow, innovate and lead in our industry,” said Mark Mangan, President of Turf Care. “This acquisition is more than just expansion; it’s a powerful opportunity to strengthen our product offerings, broaden our market reach and provide greater value to our customers. By welcoming Beaty into the Turf Care family, we are reinforcing our commitment to excellence and positioning ourselves for an even brighter future.” “We are excited about this next step in the Beaty Fertilizer story. For almost 50 years, our family and our employees have worked hard to serve customers and communities with pride and heart,” said John Beaty, President of Beaty. “Now, we are embracing an opportunity for growth with Turf Care. With our combined know-how and resources, we’ll keep building on what we’ve worked so hard to create and bring even more value to our customers, employees and partners. We truly believe this partnership will keep the Beaty legacy going strong while opening up new doors for growth and innovation.” Tarun Kanthety, Vice President at Platte River, added, “We believe the acquisition of Beaty Fertilizer represents a strategic step in expanding Turf Care’s footprint and product breadth... as it scales and enhances its value proposition to customers.”
Root out Grubs, Before they Attack Yours! White grubs, the immature stage of several scarab beetles—including Japanese beetles, masked chafers, May and June beetles, and green June beetles—are a major threat to turfgrass across the Southeast. These beetles follow a complete metamorphosis (egg, grub, pupa, adult), with most species completing their cycle in one year. Eggs are laid in early summer, grubs hatch within two weeks, and begin feeding on turfgrass roots through the late summer and fall. May and June beetles differ slightly, with a two- to three-year life cycle and prolonged feeding as third-instar grubs. Grubs damage turf by severing roots, causing grass to yellow, wilt, or lift easily from the soil. Feeding is typically concentrated in patches and worsens during hot, dry weather. Wildlife digging for grubs can create further turf destruction. Healthy turf may tolerate 5–10 grubs per square foot, but damage becomes evident as populations rise or turf is under stress. Early detection and timing are essential. Scouting begins in late June, shortly after adult beetle activity peaks. Monitoring plants favored by beetles can signal egg-laying is underway. Treatment is most effective when small grubs are active—typically from mid-July through early August. For professional turfgrass managers, insecticides containing imidacloprid (Merit®), chlorantraniliprole (Acelepryn®), or trichlorfon (Dylox®) are the most effective tools. The primary months of preventative application of Acelepryn® is from April to end of May and Merit® from April into July - targeting grubs before they hatch. Curative treatments with Dylox® or similar products are applied July through the fall, when young grubs are feeding and most vulnerable. Always follow label directions for optimal application and safety. Timing may vary slightly by regional seasonal needs. Turf Care Supply has a variety of professional TCS Growstar insecticide fertilizers available to protect your turf and prevent grub damage, before it starts. Click on the button below to view products, contact your sales rep for addition TC Growstar products available.
Platte River Equity Portfolio Company Turf Care Supply, LLC Acquires Agri-Nutrients, Inc. Brunswick, OH , October 9, 2024 – Platte River Equity (“Platte River”) portfolio company Turf Care Supply, LLC (“Turf Care”) is pleased to announce its acquisition of Agri-Nutrients, Inc. (“Agri-Nutrients”), a manufacturer and blender of custom granular fertilizers for the turf & ornamental (“T&O”) industry. This strategic acquisition provides Turf Care with an established presence in the south-central United States, an enhanced product portfolio and additional manufacturing capacity. “This acquisition represents much more than a business transaction; it is a strategic step forward in expanding our reach and enhancing our customers’ growth. By bringing Agri-Nutrients into the Turf Care family, we are broadening our product portfolio, expanding our market presence and further positioning ourselves as a leader in providing innovative solutions for our customers,” said Mark Mangan, President of Turf Care. “We are excited about joining the Turf Care team,” said Jim Montgomery, President of Agri-Nutrients. “At Agri-Nutrients, our core values center around customer service and product innovation, and we are confident that this combination will allow us to better serve the needs of our customers.” “Platte River welcomes the Agri-Nutrients team to Turf Care. This transaction underscores our long-term commitment to fostering growth through both organic and inorganic initiatives across the Turf Care platform,” said Tarun Kanthety, Vice President of Platte River. “The partnership with Agri-Nutrients strengthens Turf Care’s value-added offering, creating additional growth opportunities across the combined customer base.” B&A Corporate Advisors served as the exclusive financial advisor to Agri-Nutrients. About Agri-Nutrients Founded in 1992 and based in Catoosa, OK, Agri-Nutrients is a manufacturer and blender of custom granular fertilizers for the T&O industry, predominantly selling into the lawn care, sports turf and golf course end markets. About Turf Care Supply Established in 1974, Turf Care Supply is one of the largest formulators and blenders of urea products to the T&O market. Turf Care has a comprehensive product portfolio of fertilizers, combination products (herbicide/insecticide), soil amendments and enhanced efficiency fertilizer ingredients. Turf Care's products are sold to distributors and blenders serving the commercial, residential and golf end markets. Turf Care operates four manufacturing facilities strategically located throughout the eastern U.S. About Platte River Equity Founded in 2006 and based in Denver, CO, Platte River Equity is a private equity firm focused on investments in established lower middle market operating companies within targeted industrial sectors where it has substantial operating and investing experience. Platte River utilizes prudent capital structures in order to invest in future growth opportunities and withstand changing economic environments. The firm also provides significant ongoing support to its portfolio companies through dedicated resources across functional areas. The firm has raised funds with committed capital in excess of $1.6 billion and is currently investing out of its fifth fund. The Platte River team is the largest collective investor across its funds, deeply aligning the firm with its investors and portfolio company management teams.